How do i know if my intercooler is leaking?

On my way to work, I noticed my low coolant light came on for a minute or two and went away. This has happened in the past, bought some coolant, added some and never happened again until today. So its pretty clear that I'm losing coolant somewhere.

Do I have to take off my intake Mani's?? If so is it just the bolts on the tops and a clamp at the Y pipe?

I have a speedriven intercooler laying around that I could throw in if needed. I know the speedriven intercooler is not prone to leaking, but does it perform any better than the stock intercooler?

Thanks guys!!